Hair brush



FIG. 1 is a perspective view of a hair brush, showing my new design;

FIG. 2 is a side-elevation view thereof, the side elevations being of symmetrical arrangement;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a cross-sectional view thereof, the cross-sectional view taken through the section 5-5 of FIG. 3; and,

FIG. 6 is a cross-sectional view thereof, the cross-sectional view taken through the section 6-6 of FIG. 2.

The broken lines represent brush bristles and are included to illustrate environmental structure of the hair brush that forms no part of the claimed design. 

CLAIM The ornamental design for a hair brush, as shown and described. 